How can I remove the multicolored lighting from an environment texture background?
If you just want to remove the color from the World Environment, but keep the lighting strength in B&amp;W, place a RGB to BW Node between your HDRI texture and the Background Node of your world shader:

If you want to keep the HDRI colors, but still have only white lighting, mix a regular background with the black and white background, using the &quot;Is Camera Ray&quot; output of a Light Path node as the mix factor:

If you want to remove all reflections from the HDRI and replace it with pure white, mix the Environment Background with a plain white Background, using either &quot;Is Reflection Ray&quot; or &quot;Is Glossy Ray&quot; (depending on your needs) from the Light Path Node as a mix factor: